254 
DR. MARTIN BARRY ON THE CORPUSCLES OF THE BLOOD. 
motion ; effecting a change of place (see par. 126.). Examined twenty- 
four hours after death. 
Fig. 107. Ox; foetus of eighteen inches. From the retina. Capillary vessels, 
forming out of corpuscles, having the same appearance as young cor- 
puscles of the blood. These corpuscles, while still red (a), apply them- 
selves together so as to form a necklace-like object, composed of ellip- 
tical beads : and having coalesced, and become pale (j3), and the mem- 
branous partitions having disappeared, they form a tube. The corpuscles 
seem to apply themselves at certain parts in such a manner as to form 
a branched vessel. Resolving themselves (here, as well as when form- 
ing other tissues) into discs, the corpuscles contain within themselves 
the elements of new corpuscles. See a in the upper part of the figure, 
y. Group of blood-corpuscles, and what seemed parts of blood-corpus- 
cles (chiefly in outline), which may serve as a specimen of the many 
forms of these corpuscles, observed along with the foregoing. The 
central corpuscle in this group, resembles one of those marked j3 in 
fig, 63 ; where the nucleus of the blood-corpuscle is forming the pus- 
globule. (Blood-vessels seen forming in the same manner, and out of 
similar objects, in the retina of a chick ; the egg incubated ten days.) 
Fig. 108. Ox; foetus of about seven inches. Outline of blood-corpuscles, observed 
among fibres from a muscle of the thigh. Most of these corpuscles 
were orange-shaped or globular, and exhibited an orifice. Some of 
them presented discs in their interior. The minutest objects in this 
figure were of the same colour as the larger ones, — blood-red. 
Fig. 109. Ox; foetus of about seven inches. Corpuscles having the same appear- 
ance as blood-corpuscles, observed among fibres from a muscle of the 
thigh. They appeared to be passing into the elements of cellular tissue, 
a. The corpuscle has one large orifice. (3, j3, (3, (3, (3. It exhibits two 
or more small orifices, y. The corpuscle has passed into a mass of 
discs ; this mass being, not cylindrical, but flattened. In such objects 
as (3 and y, the outline of discs is hidden, apparently, by red colouring 
matter. 
Fig. 110. From the same. Altered corpuscle, having the same appearance as a 
corpuscle of the blood. It had become a mass of discs resembling those 
marked y in fig. 109, but terminated at each extremity in a fibre ; thus 
presenting a more advanced stage in the formation of cellular tissue. 
Fig. 111. Ox; foetus of about five inches. Altered corpuscles having the same 
appearance as blood -corpuscles, passing into cellular tissue. The fila- 
ments into which the corpuscles are prolonged, consist of coalesced 
discs. Colour quite red. Taken from under the superficial muscles of 
the neck. 
